ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.8 > S66.80 S66.80 Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level Non-Billable/Non-Specific Codes S66.801Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right handS66.801A..., initial encounterS66.801D..., subsequent encounterS66.801S..., sequelaS66.802Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, left handS66.802A..., initial encounterS66.802D..., subsequent encounterS66.802S..., sequelaS66.809Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified handS66.809A..., initial encounterS66.809D..., subsequent encounterS66.809S..., sequela